纳米SiO2与间苯二酚-双(二苯基磷酸酯)对聚碳酸酯-ABS合金的协同阻燃机制  

Synergistic flame retardant mechanism of nano SiO2 and resorcinol bis(diphenylphosphate) on polycarbonate-ABS blends

作　　者：高顺 郭正虹 GAO Shun;GUO Zhenghong(Lab of Polymer Material and Engineering,NingboTech,Zhejiang University,Ningbo 315100,China)

机构地区：[1]浙大宁波理工学院高分子材料与共混实验室,宁波315100

出　　处：《复合材料学报》2020年第11期2897-2907,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51991355)。

摘　　要：选用以凝聚相阻燃机制为主的间苯二酚-双(二苯基磷酸酯)(RDP)作为阻燃剂,纳米SiO2为协效剂,以熔融共混法制备了聚碳酸酯(PC)-丙烯腈-丁二烯-苯乙烯共聚物(ABS)阻燃合金。通过垂直燃烧(UL94)和锥形量热测试(Cone)探究了纳米SiO2与RDP复配对PC-ABS合金阻燃性能和燃烧行为的影响。采用SEM观察燃烧残炭的微观形貌,用EDS分析炭层表面元素含量的变化,进一步探究了纳米SiO2与RDP在PC-ABS凝聚相中的协效阻燃机制。通过拉伸性能和冲击性能测试研究纳米SiO2与RDP复配对PC-ABS合金力学性能的影响及甲基丙烯酸甲酯-丁二烯-苯乙烯(MBS)对PC-ABS合金的增韧增容作用。结果表明,纳米SiO2与RDP可以在凝聚相中形成Si-O-P化合物,对PC-ABS合金的燃烧炭层起到增强作用,从而改善PC-ABS合金的阻燃性能;适量MBS的加入可以提高PC-ABS合金的冲击强度和断裂伸长率,但会降低其阻燃性能。The flame retardant polycarbonate(PC)-acrylonitrile-butadiene-styrene(ABS)blends was prepared by melt blending with resorcinol bis(diphenylphosphate)(RDP)(mainly based on condensed phase flame retardant mechanism)and nano SiO2 as the synergist.The effects of nano SiO2 and RDP on the flame retardancy and combustion behavior of PC-ABS blends were investigated by vertical combustion(UL94)and cone calorimetry(Cone).SEM was used to observe the micro morphology of burning carbon residue,and EDS was used to analyze the change of element content on the surface of carbon layer,so as to further explore the synergistic flame retardant mechanism of nano SiO2 and RDP in the condensed phase of PC-ABS.The effects of nano SiO2 and RDP on the mechanical properties of PC-ABS blends and the toughening and compatibilizing effects of methyl methacrylate-butadiene-styrene(MBS)on the blends were studied by tensile and impact tests.The results show that nano SiO2 and RDP can form Si-O-P compound in the condensed phase,which can enhance the combustion carbon layer,thus improving the flame retardancy of PC-ABS blends;The impact strength and elongation at break of the PC-ABS blends can be increased with the addition of MBS,but the flame retardancy can be decreased.

关 键 词：聚碳酸酯(PC) 丙烯腈-丁二烯-苯乙烯共聚物(ABS) 纳米SIO2 阻燃 凝聚相 力学性能 

分 类 号：TB324[一般工业技术—材料科学与工程]